Dactyl

http://dactyl.sourceforge.net/
This extension makes it possible to control the browser almost entirely by keyboard, in a manner similar to the
Vim text editor. This is a fork of Vimperator that retains more of the look and feel of older Vimperator versions.

The copyright and license notices on this page only apply to the
text on this page. Any software or copyright-licenses or other
similar notices described in this text has its own copyright notice
and license, which can usually be found in the distribution or license
text itself.